VXI VT1538A Rotational Velocity Measure, Pulse Width Measure, Frequency Source, Pulse Source

Auto-Gating(adaptive aperture)	1mSec to 1Sec for Frequency
	1mSec to 1Sec for Perid (using SENS:PER:RANGE 1)
	4mSec to 4Sec for Perid (using SENS:PER:RANGE 4)

Rotational Velocity Measure	Characteristics	Extra Tooth Wheel or Missing Tooth Wheel
	Range in RPS	------1-------	to 100---------,---000--------
		nt eet h	nt ee th
	Accuracy		.01%
	Resolution in RPS	(nt eet h × f)2
		--4.194--------------MHz------------where f is nt ee th per second
	Minimum Pulse Width	500 nS

Pulse Width Measure	Periods Averaged	1 to 255
	Range	5 μS to 1 S
	Accuracy	±(250nS+0.1%)
	Resolution	59.6 nSec

Frequency Source	Range	64 Hz to 40 KHz Square Wave
		128 Hz to 40 KHz other shapes
	Accuracy	0.01%
	Resolution	2
		fo u t
		-------------------------
		4.194MHz

Pulse Source	Range	7.87	μsec to 1/f-7.87 msec continuous pulse
		7.87	μsec to 7.812 msec single pulse per trigger
	Accuracy		0.01%
	Resolution		238.4 nsec

Agilent E1538A Enhanced Frequency/Totalize/PWM SCP 79